* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
}

.header {
    background: #fff;
    display: flex;
    align-items: center;
    padding: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: relative;
}

.header .back {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    position: absolute;
    left: 10px;
}

.header .title {
    flex: 1;
    text-align: center;
    font-size: 18px;
    font-weight: bold;
}

.tab-container {
    display: flex;
    justify-content: space-around;
    background: #fff;
    padding: 10px 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.tab {
    font-size: 16px;
    color: #888;
    padding: 10px 0;
    flex: 1;
    text-align: center;
    cursor: pointer;
}

.tab.active {
    color: #ffa800;
    font-weight: bold;
    border-bottom: 2px solid #ffa800;
}

.main-content {
    text-align: center;
    margin-top: 50px;
}

.main-content.hidden {
    display: none;
}

.empty-image {
    width: 150px;
    height: auto;
    margin-bottom: 20px;
}

.empty-text {
    font-size: 16px;
    color: #888;
    margin-bottom: 20px;
}

.btn {
    background: #ffa800;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
}

.btn:hover {
    background: #ff8c00;
}